MRF275L Datasheet, PDF (2/13 Pages) Tyco Electronics – N-CHANNEL BROADBAND RF POWER FET

ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
ON CHARACTERISTICS
Gate Threshold Voltage (VDS = 10 V, ID = 100 mA)
Drain–Source On–Voltage (VGS = 10 V, ID = 5.0 A)
Forward Transconductance (VDS = 10 V, ID = 2.5 A)
VGS(th)
1.5
VDS(on)
0.5
gfs
3.0
2.5
0.9
3.75
4.5
Vdc
1.5
Vdc
—
mhos
DYNAMIC CHARACTERISTICS
Input Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)
Ciss
—
135
—
pF
Output Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)
Coss
—
140
—
pF
Reverse Transfer Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)
Crss
—
17
—
pF
FUNCTIONAL CHARACTERISTICS
Common Source Power Gain
(VDD = 28 Vdc, Pout = 100 W, f = 500 MHz, IDQ = 100 mA)
Gps
7.5
8.8
—
dB
Drain Efficiency
(VDD = 28 Vdc, Pout = 100 W, f = 500 MHz, IDQ = 100 mA)
η
50
55
—
%
Electrical Ruggedness
ψ
(VDD = 28 Vdc, Pout = 100 W, f = 500 MHz, IDQ = 100 mA,
VSWR 10:1 at all Phase Angles)
No Degradation in Output Power
+VGG
C1
R1
R2
C2
C12
C13
+28 V
RFC2
RFC3
+
C11
C14
C15
RF
INPUT _C3
C4
Z1
C5
C6
Z2
DUT
RFC1
Z3
C7
C8
Z4
C9
RF
C10 ^OUTPUT
C1, C11, C14
C2
C3, C10
C4, C6, C8, C9
C5
C7
C12, C13
C15
0.1 µF, Ceramic Capacitor
240 pF, ATC Type Chip Capacitor
270 pF, ATC Type Chip Capacitor
1–20 pF, Trimmer Capacitor, Johansen
24 pF, Mini–Unelco Type Capacitor
24 pF, Mini–Unelco Type Capacitor
680 pF, Feedthru Capacitors
10 µF, 50 V, Electrolytic Capacitor
RFC1
RFC2, RFC3
Z1,
Z2, Z3
Z4
Board Material
Figure 1. 500 MHz Test Circuit
8 Turns AWG #18, 0.25″ I.D., Enameled
Ferroxcube VK200 19/4B
0.250″ x 0.800″, Microstrip Line
0.250″ x 0.400″, Microstrip Line
0.250″ x 1.25″, Microstrip Line
0.062″ Glass Teflon^®,
2 oz. Copper, Double Clad Copper
Board, ε_r = 2.55
REV2
2